Temperature-signal for stacks.



WLR. KLECKNER.

TEMPERATURE SIGNAL FOR STACKS. APPLICATION FILED MAR. 16. me.

Patented May 8,1917.

lNl/EN TOR ATTORNEYS WILLIAM R. KLECKNER, O13 COWELL, CALIFORNIA.

TEMPERATURE-SIGNAL FOR, STACKS.

Specification of Letters Patent.

Patented May 8, 1'917.

Application filed March 16, 1916. Serial N 0. 84,583.

Be it known that I, VVILLI'AM 1t. Kmore NER, a citizen of the United States, and a resident of Cowell, Costa and State of California, have invented a new and Improved Temperature- Signal for Stacks, of which the following is a full, clear, and exact description.

My invention relates to an electricallyoperated signal for indicating a predetermined maximum temperature of gases within a stack, and also when an excessive fuel consumption begins. The object of the invention is to provide an inexpensive, simple, strong and reliable signaling device adapted to control a normally open switch of an electric circuitin which audible and visible signals are provided.

With the above and other objects in view, the nature of which will more fully appear as the description proceeds, the invention consists in the novel construction, combination and arrangement of parts as herein fully described, illustrated and claimed. In

- the accompanying drawings, forming part of the application, similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a fragmentary section through a stack provided with an embodiment of my invention;

Fig.2 is an enlarged cross section on line 22, Fig. 1;

Fig. 3 is a switch end elevation, a portion of the switch being partly broken away to show the details of construction; and

Fig. 4 is a wiring diagram from various stacks to the signaling means.

Referring to the drawings, 5 is the smoke stack across which a metallic tube 6 is disposed, the end of the tube projecting through the sides of the stack. The tube 6 has a longitudinal gap 7 so that in cross section it has substantially the shape of a horseshoe. One of the projecting ends of the tube is bolted rigidly to a bracket 8 in such a way that the flowing gases will enter into the tube through the gap. The other end of the tube is provided with a rigid, upwardly-extending arm 9 located outside of the stack. One end of a first-class lever 10 is pivotally connected to said arm, the fulcrum 11 of said lever 10 being on the support 12. The other end of the lever 10 is connected pivotally to the end of an ex pansion rod 13 which extends through the in the county of Contra entire length of the tube 6 and projects through the ends thereof. The expansion rod 13 is supported within the tube by transverse bars 14 bridging the gap 7 of the tube. The end of the rod 13 at the bracket 8 is connected pivotally to a normally-open switch 15 secured to the bracket 8.

End pieces 16 are provided within the tube 6 to prevent the gases from escaping along the tube 6. An increase of heat in the stack causes an increase of length in the expansion rod 13, in consequence of which the switch arm is caused to move to the left in Fig. 1. It will be noted that the tube 6 is free to expand in a direction opposite from the rod 13, consequently a multiplied action is obtained from the rod and tube upon the switch 15. When the switch arm comes in contact with a binding post 17 to which a wire is connected, the circuit is completed, for the other wire is connected to the fulcrum of the switch arm. The closing of the circuit by the switch will render operative the visible and audible signals 18 and 19 in the circuit, as will be seen from Fig. 4C. The circuit to all the signals of the various stacks are controlled by a single knife switch 20.

In making adjustment for the calibration of the device a pyrometer may be used in the stack, and as soon asthe pyrometer shows the maximum temperature allowable for the stack gases one of the lead wires is attached to the binding posts 17 which is at that moment in engagement with the switch arm.

Another method of adjusting is to supply the furnace, boiler or kiln with the maximum allowable fuel during the period of, say, one-half hour. Connect the lead Wire to the binding post 17, which is next to the left to the binding post in contact with the switch arm. The contact with the binding post to which the wire is connected will indicate, when the circuit is closed by the switch, a higher degree of heat than was exerted by the normal amount of fuel supplied during the half hour period of normal fuel. consumption.

I claim:

1. In a device of the class described, a tubular member open longitudinally, means for rigidly securing one end of said tubular member, an arm associated with the other end of said member, a first-class lever having one end thereof connected to said arm, and an expansible rod within the tubular sion rod member adapted to be exposed to heat through the gap of the tubular member, one end of said rod being connected to the other end of the first-class lever.

2. In a device of the class described, an expansible tubular member open longitudinally, means for securing one end of said tubular member, a rigid arm extending from the other end of said tubular member, a first-class lever having one end thereof in pivotal connection with said arm, an expan- Within said tubular member an having one end thereof connected to the other end of said first-class lever, and transverse members bridging the longitudinal opening of the tubular member adapted to support the expansion rod, said expansion rod being accessible to heat through the longitudinal opening in said tubularmember.

3. In combination With a stack, an expansible tubular member having a longitudinal gap whereby in cross section the Copies 01 this patent may be obtained for five cents each, by addressing the Washington, 1L0." r

tubular member has substantially the shape of a horseshoe, said tubular member projecting through the end of the stack, means for securing one projecting end of said tubular member to the stack, an arm extending from the other projecting end of the tubular member, a lever of the first class having its fulcrum secured to the stack, one end of said lever being in pivotal connection With the arm, an expansion Vrod passing through the tubular member and having one end thereof in communication With the other end of said lever, and transverse members bridging the gap of said tubular member and forming supporting means for the rod in the tubular member.

In testimony Whereof I have signed my name to this specification in the presence of tWO subscribing Witnesses.

' WILLIAM R. KLEGKNER.

Witnesses J. E. BUTLER, D. S. SEE.

"Commissioner of Patents, 

